K-cup actress Marina Yuzuki finally lets her anal hole open! Marina, a dorm mother, feels pain in her buttocks, so she applies some healing ointment given to her by a dorm mate... The more time passes, the hotter and more her anus throbs. In fact, the dorm mate mistakenly gave Marina an aphrodisiac cream. Marina's sensitivity skyrockets and she becomes addicted to the pleasure of her anus. Even though she knows it's wrong, she's not satisfied with just digging with her fingers, so she approaches the dorm mates for cocks and toys!